Pipe-cutting machine.



0. A. OLSON.

PIPE CUTTING MACHINE.

I APPLICATION FILED FEB. 19, 1907. 92%551 Patented Dec. 27, 1910.

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WITNESSES lNVENTOR nu: mmms PETERS c0., WASHINGTON, n. c.

G. A. OLSON.

PIPE CUTTING MACHINE.

APPLICATION FILED FEB. 19, 1907.

979,551 a Patented Dec. 27, 1910.

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WITNESSES INVENTOR M L/M:

YHE NORRIS FCTERS co., wasnmmn. nv c.

entree stares rarest OFFEQE,

CHARLES A. OLSON, OF CHICAGO, ILLINOIS, ASSIGNOR T0 CRANE COMPANY, OFCHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

PIPE JUTTING MACHINE.

eraser.

Application filed February 18, 1907.

Specification of Letters Patent.

Patented Dec. 2?, 1910.

Serial No. 358,214.

T 0 all whom it may concern:

Be it known that 1, CHARLES A. OLSON, a citizen of the United States,residing at Chicago, in the county of Cook and the State of Illinois,have invented certain new and useful Improvements in Pipe-CuttingMachines, of which the following is a specification.

My invention relates to a mechanism for cutting oil pipe, and has forits objects; to provide an apparatus in which the pipe may be cut offwith greater rapidity than has heretofore been done; to provide anapparatus wherein a yielding feed is secured for the cutters therebypermitting them to cut at a speed best suited to the material and to thecutters; to provide an improved arrangement of steady rests and cutters;and to provide an arrangement wherein all of the plurality of cuttersmay be simultaneously and equally operated. These objects and otherswhich will be apparent to those skilled in the art 1 accomplish in myinvention, one form of which is illustrated in the accompanyingdrawings, in which Figure 1 is a side view of the machine, the cuttingoff mechanism being shown in cross section on the line 11 of Figure 2,and

Figure 2 is an elevation looking at the right hand end of the device asshown in Figure 1.

My device is intended primarily for the use in cutting off nipples fromthe end of a long pipe wherein rapidity of operation is desirable, andas usual in machines of this type the pipe is carried in a rotatingspindle portion provided with a chuck and means ,for feeding the pipeforward step by step the length of the nipple into the cutting offmechanism to which this invention particularly relates.

Referring to the drawings, 1 is the body of the machine which may be ofany preferred type, 2 is the rotating spindle mechanism by which thepipe is rotated and by which it is fed ahead. step by step, whichrotating and feeding mechanism is well known in the art and need not beparticularly described, 3 is the supporting carrier which is slidablymounted on the frame in the usual way and is movable thereonlongitudinally by means of the hand wheel 1- having its shaftoperatively connected to the carrier in the usual way, 5 are the steadyrest blocks dovetailed into the carrier as indicated in Figure 1, andslidable therein, which blocks engage the pipe as shown in Figure 2, 6is the adjusting screw for moving the steady rest blocks, which screwpasses through brackets 7 attached to the steady rest block and carriesthe operating hand wheel 8, 9 are the cutter blocks, which blocks asshown in Figure 1 are dovetailed .inside of the steady rest blocks 5 andare slidable therein back and forth, 10 are the cutters secured to thecutter block by means of set screws 11, 12 are the cylinders of thepneumatic operating rams, which are secured to the carrier frame 3 andare provided with the pistons 13, which pistons are connected to thecutter blocks in the manner shown in Figure 2, 1 1 are the springs forreturning the pistons to their outer extremes after a nipple has beencut, 15 are pipes leading to the cylinders for supplying air pressurethereto, for moving the cutters inward, 16 is the main supply pipe forthe tube pipe 15, and 17 is the valve adapted to control both of thepipes 15 at the same time.

In operation, after a pipe has been fed through the cutters, the valve17 is opened admitting air through the pipe 15 and forcing the pistons13 forward till the pipe is severed, after which the valve is turned tothe position of exhaust and the springs 14 immediately carry the cutterblocks back to the position shown in Figure 2. This is a very rapidoperation as the pressure in the pipe 16 may be adjusted to feed thecutters forward with a speed as high as is consistent with the hardnessof the metal cut and the quality of the cutters, and as the springs 14act on the release of pressure from behind the pistons, no time is lostin withdrawing the cutters, as is the case when screw feeding means areused. Furthermore this arrangemcntof pneumatic cutters is desirable forthe reason that a yielding feed is supplied to such cutters and suchfeed is adjusted automatically dependent upon the condition of metalout, which is not the case where a positive feed is employed and thecutters are forced through the hard outside shell of the pipe with thesame rapidity as through the inner softer portion. \Vith thisarrangement of feeds the cutters last longer and the speed of operationis more rapid than with any positive feed. The arrangemeans foradjusting and holding such blocks in position, a pair of opposing cutterblocks 15 mounted in the steady rest blocks, cutters mounted therein,and means for moving the cutter blocks inward.

In testimony whereof I have hereunto signed my name in the presence ofthe two 20 subscribing witnesses.

CHARLES A; OLSON.

WVitnesses:

PAUL CARPENTER, JAMES NICHOLAS LORENZ.

